Explanation:

- Option 1: Nongkrem

- Nongkrem is a festival celebrated by the Khasi tribe in the state of Meghalaya. It is a harvest festival marked by thanksgiving to the Almighty for a bountiful harvest and is not related to Jharkhand.

- Option 2: Losar

- Losar is the Tibetan New Year celebrated by Tibetan Buddhists and some Buddhist communities in India, particularly in Ladakh, Sikkim, and Himachal Pradesh. It is not associated with the tribal people of Jharkhand.

- Option 3: Suata

- There is limited information about Suata being a tribal festival in Jharkhand. It does not widely appear among recognized Jharkhand tribal festivals.

- Option 4: Bhagta Parab

- Bhagta Parab is indeed celebrated by some tribal communities in Jharkhand. It is a traditional festival marked by music, dance, and community bonding.

Your answer, Option 4 - Bhagta Parab, appears to be correct for the tribal festival of Jharkhand.